[q] nexus 5 not working help please urgent

(my phone is rooted)I recently installed the android l on my nexus 5 using Nexus root tool kit.It was glitching so i installed 4.4.4.Then whenever i put my nexus 5 on it started saying google search stopped working and also gmail.So i did some other stuff.And now t is stuck on the google logo when i try and put it on.I held the three buttons and went into recover mod.I cleared the cache partition and also wiped my phone.Still it is stuck in the google logo please please please help im really scared.

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